I am swapping out a cluster with gages to one with gages and a Tach. The year of the Tach cluster is unknown
Does this cluster have an amp gauge or a voltage gauge? mechanical or electric oil pressure guage? it is going into an 85. I have checked the wiring one to the other and the circuit boards are the same except for the gas gage position and the tach (which I expect). The pig tail in the 85 has one open wire position #14. The Pig tail from the Tach gage set up is missing two wires in positions #14 & #15. Number 14 is the 3rd lug of the oil pressure gage (which is un-needed). Number 15 is the common between oil pressure, water temp, and fuel I am assuming it is their ground?
You can look for a "+" or a "-" on the printed circuit to tell you if it's the common ground or the common main power lead Also I was given the pig tail for the tach it has a 3 prong connector that goes on the back of the tach that contains a black wire(ground) a brown wire (to the distributor) and a pink (12V hot) that I am assuming. However connected to the pink wire is another harness that I don't have a clue where it goes to or what it is for. It is about 32 inches long and has two connectors on it. One has 5 wires in it and the plug is in the shape of a bow tie. The other end has 4 wires in it and it is in the shape of a "T". Two wires side by side on the top like this --two vertically like this II. In each plug the wire colors are tan with a white strip, tan, light blue, light green. The bow tie shaped end has the additional pink.
This extra wiring leads me to believe this cluster MAY have come out of a vehicle with a diesel engine in it. If this is the case I don't think the tach will work properly on a gas engine. I may be wrong on that so it would be best to pm a message to Crossy for verification on this.
These are my questions:
1) Does anyone have a wiring diagram specific to an 85 Cluster with Tach and gages that scan me a efile copy?
2) Does anyone have an 85 Truck apart that has a factory Tach that can shoot me some pictures?
I believe G.M. stopped putting tachs into the trucks in either '82 or '83
3) Does anyone know if the output for the little fuel gauge is the same as the big one?
No it's on the opposite side
4) Can I just move the wire in the loom to the new position for the gas gage or do I even need to?
Yes you will need to as the sender circuit is on the opposite side of the plug from your original cluster
5) Can anyone shed some light on these questions?
I don't want the nickname Sparky.
Thanks in advance for any help you can give.